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# 如何追踪HttpClient发起HTTP调用? ## httpclient 4.2.x - 引入所需插件 ```xml <!-- httpClient插件,监控httpClient 4.2的调用 --> <dependency> <groupId>com.ai.cloud</groupId> <artifactId>skywalking-httpClient-4.2.x-plugin</artifactId>
<version>{latest_version}</version>
</dependency> ``` - 使用SWTracingHttpClient封装所需的httpClient,此httpClient所有调用都会被监控 ```java HttpClient httpclient = new SWTracingHttpClient(new DefaultHttpClient()); ``` - 上下文将被存储在http request head,中,默认名称和SkyWalkingFilter保持一致。 - 如果服务端使用dubbox 2.8.4 的提供的http-rest,请使用方法重载 ```java HttpClient httpclient = new SWTracingHttpClient(new DefaultHttpClient(), "Dubbo-Attachments"); ```